The Dark Room: Developing and Printing 63 



be made several shades darker than we wish the 

 finished picture, for it will fade in the toning 

 bath. For toning we can use any of the double 

 or single toning solutions sold by dealers, but the 

 best of them are more or less unreliable. We had 

 much better buy the chloride of gold and make 

 our own bath. The one that I have used for 

 years and found eminently satisfactory is as 

 follows: Bicarbonate of soda, 4 grains; gold, \ 

 grain; water, 16 ounces. 



The prints should first be washed in five or six 

 changes of water or in running water for fifteen 

 or twenty minutes, to remove all the free silver. 

 They should then be transferred directly to the 

 toning bath, and while in this they should be con- 

 stantly moved until the required tone is reached, 

 when they should be placed in a weak hypo and 

 alum bath. In this they should be allowed to 

 remain for ten or fifteen minutes and then washed 

 in running water for at least half an hour. 



For reproduction purposes glossy prints are 

 required by most publishers, and for this the silver 

 paper is by far the best. The gloss may be 

 obtained either by burnishing them, on a machine 

 made expressly for that purpose, after they have 

 been mounted, or by "squeegeeing" them to a 

 ferrotype board. The boards must be kept per- 

 fectly clean and free from scratches, otherwise the 

 prints will stick to them. 



